<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="~assets/logo.jpg" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="loginOut">退出</el-button>
    </el-header>
     <!-- 页面主体区域 -->
    <el-container>
       <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">||||</div>
        <el-menu
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409EFF"
      unique-opened 
      :collapse="isCollapse"
      :collapse-transition="false" router
      :default-active="activePath">
      <!-- 一级菜单 -->
      <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
        <template slot="title">
          <i :class="iconsObj[item.id]"></i>
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级菜单 -->
        <el-menu-item :index="'/' + subItem.path"  v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.path)">
          <template slot="title">
          <i class="el-icon-menu"></i>
          <span>{{subItem.authName}}</span>
        </template>
        </el-menu-item>
      </el-submenu>
      
    </el-menu>
      </el-aside>
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>

</template>

<script>


export default {
  name: 'Home',
  data() {
    return {
      menuList: [],
      iconsObj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')

  },
  methods: {
    loginOut() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    //点击按钮切换菜单的显影
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    async getMenuList() {
      const {data: res} = await this.$http.get('menus')
      if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
    },
    // 保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
  .home-container {
    height: 100%;
  }
  .el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 30px;
  align-items: center;
  color: #fff;
  font-size: 20px;
  
  > div {
    display: flex;
    align-items: center;
    height: 100%;
    span {
      margin-left: 15px;
    }
    img {
      height: 90%;
      border-radius: 20px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}

.el-main {
  background-color: #eaedf1;
}

.iconfont {
  margin-right: 10px;
}

.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  font-weight: 600;
  letter-spacing: 0.3em;
  cursor: pointer;
}
</style>